

# 构建列表 形式[] 其中元素以"," 隔开
# 列表是有顺序的一组值，顺序是从 0 位置开始的




squares = [1, 4,  9, 16, 25]
# name_str = "Mike,Mary,Jan,Jack"
user_date_list = ["shanlin","xinyan"]
passwork_list = [111,222]
user_age = [20,19]
# ...

user_data = [["shanlin",111,20]["xinyan,222,19"]]

name_list = ["Mike,Mary,Jan,Jack"]
name_str = "Mike,Mary,Jan,Jack"


# 应用：请取出第一个名字（如取第一个名字）
# print(names_str[0])

print(name_str[0])
print(name_list[0])
print(user_age[0])
print(user_data[0])